Rotational fixing for a guide pin of a disc brake and method thereof

ABSTRACT

A rotational fixing for a guide pin of a disc brake and method for fixing a guide pin of a disc brake. The rotational fixing includes a guide sleeve having a sleeve portion, a receiving portion of a brake carrier, and an inter-connection. The receiving portion receives the sleeve portion. The inter-connection engages the sleeve portion and the receiving portion and restricts rotation of the guide sleeve relative to the brake carrier when the sleeve portion is received by the receiving portion.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.15/174,080, filed Jun. 6, 2016, the disclosure of which is herebyincorporated in its entirety by reference herein.

TECHNICAL FIELD

The present invention relates to a disc brake. In particular, thepresent invention relates to a rotational fixing for a guide pin of adisc brake and a method of fixing a guide pin of a disc brake.

BACKGROUND

Disc brakes are commonly used for braking heavy vehicles such as trucks,buses and coaches.

Disc brakes conventionally comprise a brake carrier, a caliper and arotor. The carrier is arranged to carry brake pads on each side of therotor. The caliper is slidably mounted on the brake carrier by two ormore guide assemblies, such that when the disc brake is actuated, thecaliper is able to slide with respect to the brake carrier. As thecaliper slides inboard, the brake pads are urged onto the opposing facesof the rotor in a clamping action and a braking action is effected.

A guide assembly typically comprises a guide pin along which the calipercan slide and a bore disposed in the caliper for receiving the guidepin. Typically each guide pin comprises a smooth outer guide sleevealong which the caliper slides and a guide bolt which extends throughthe guide sleeve and is screwed into a bore of the brake carrier toretain the guide sleeve.

This arrangement has been proven over many years of usage. However, ithas been recognized that in certain testing conditions, specificallywhen a vehicle undergoes a significant number of forward and reversemovements, there is a risk that the guide bolt of the disc brake mayrotate and loosen.

Previous attempts to solve this problem have utilized lock patches toinhibit rotation of the guide bolt.

However, the present inventors have recognized that this approach ineffect deals with a symptom of the problem rather than the cause. Thepresent inventors have also identified that the cause of the looseningbolt problem is the rotation of the guide sleeve and the rotation of theguide sleeve being frictionally transmitted into rotation of the bolt.

The present invention seeks to overcome or at least mitigate theproblems of the prior art.

SUMMARY

A first aspect of the invention provides a rotational fixing for a guidepin of a disc brake. The fixing restricts movement of the guide pinrelative to the brake carrier by inter-locking the guide sleeve of theguide pin and the brake carrier.

The rotational fixing for a guide pin of a disc brake may comprise: asleeve portion of a guide sleeve; a receiving portion of a brake carrierto receive the sleeve portion; and an inter-connection to engage thesleeve portion and receiving portion so as to restrict rotation of theguide sleeve relative to the brake carrier, when the sleeve portion isreceived by the receiving portion.

By engaging the sleeve portion and receiving portion, the rotationalfixing is able to substantially inhibit, rotational movement of theguide sleeve relative to the brake carrier in a clockwise directionand/or anti-clockwise direction. Thus, the rotational fixing is able tosubstantially avoid, undesirable rotational movement of the guide sleeverelative to the brake carrier caused by a changing torque acting on thedisc brake as a vehicle moves repeatedly forwardly and backwardly. Thetransmission of rotation from the guide sleeve to the guide bolt of theguide pin and consequential loosening of the guide bolt is therebysubstantially averted.

Preferably, the inter-connection is also configured to engage the sleeveportion and receiving portion so as to restrict translation of the guidesleeve relative to the brake carrier, when the sleeve portion isreceived by the receiving portion. As a result, the rotational fixing isable to substantially impede lateral translational movement of the guidesleeve relative to the brake carrier in the circumferential direction Xand perpendicular translational movement of the guide sleeve relative tothe brake carrier in the tangential direction Y. Thus, the rotationalfixing is able to forestall any undesirable movement (rotational andtranslational) of guide sleeve relative to the brake carrier caused bydynamic loads acting on the disc brake.

The sleeve portion of the guide sleeve may be a first end portion of theguide sleeve or a rim at the first end of the guide sleeve. The sleeveportion may alternatively comprise a flange arranged at the first end ofthe guide sleeve comprising an outer edge and a flange face.

The receiving portion is configured to receive the sleeve portion suchthat, when received, the guide sleeve extends from the brake carrier inan axial direction A. The receiving portion of the brake carrier maycomprise a receiving face against which the sleeve portion is locatedwhen the sleeve portion is received by the receiving portion and whichdefines the region where the guide sleeve is mounted on the brakecarrier. The receiving portion may be deformable during the assembly ofthe rotational fixing. The receiving face may be a surface region of aninboard surface of the brake carrier, wherein the receiving face issubstantially flush with the inboard surface of the brake carrier.Alternatively, to enhance the fixing action, the receiving portion maycomprise a recess formed in the brake carrier in which the sleeveportion can be fitted so as to further restrict translational movementbetween the guide sleeve and the brake carrier, and the receiving faceis disposed in the recess.

The inter-connection may comprise a connector that is locatable betweenthe sleeve portion and receiving portion to form an engagement. Theconnector may be locatable to extend in the axial direction A betweenthe sleeve portion and receiving portion. Alternatively, the connectormay be locatable to extend in a radial direction between the sleeveportion and the receiving portion, perpendicular to the axial directionA in which the guide sleeve is mounted on the brake carrier.

The inter-connection may comprise a first cavity formed in the sleeveportion to receive a first part of the connector and a second cavityformed in the receiving portion to receive a second part of theconnector, wherein the connector is co-locatable in the first cavity andthe second cavity so as to engage the guide sleeve and brake carrierwhen the sleeve portion is received by the receiving portion. The firstcavity may be formed in the flange face. The second cavity may be formedin the receiving face.

The first cavity and first part of the connector are preferablyconfigured to form an interference or press-fit connection. Likewise,the second cavity and second part of the connector is preferablyconfigured to form an interference or press-fit connection.

The first cavity may be a pre-formed first cavity in the sleeve portion,formed prior to receiving the first part of the connector. The secondcavity may be a pre-formed second cavity in the receiving portion,formed prior to receiving the second part of the connector. If thereceiving portion is deformable, the pre-formed second cavity may be adeformable as the second part of the connector is received in thepre-formed second cavity so as to enhance the interference or press-fitconnection and minimize tolerances. Alternatively, to create a press-fitconnection and minimize tolerances, the second cavity may be a formablesecond cavity in the receiving portion, formed when the sleeve portionis received in the receiving portion and the connector is pushed againstthe deformable receiving portion to form a cavity in which the secondpart of the connector is received.

The connector may comprise a cylinder, cuboid, sphere, ovoid, ellipsoidor any other suitably shaped body. In an embodiment, the connector maybe a ball-like connector with a substantially spherical body, the firstcavity may be a first semi-circular cavity configured to receive a firstsector of the ball, the second cavity may be a second semi-circularcavity configured to receive a second sector of the ball, wherein theball is co-locatable in the first cavity and the second cavity to engagethe guide sleeve and brake carrier when the sleeve portion is receivedby the receiving portion. The ball connector may be a ball bearing. Inan alternative embodiment, the connector may be a pin-like connectorwith an elongate body, the first cavity may be configured to receive thefirst end of the pin, the second cavity may be configured to receive thesecond end of the pin and the pin is co-locatable in the first cavityand the second cavity so as to engage the guide sleeve and brake carrierwhen the sleeve portion is received by the receiving portion.

Alternatively, the inter-connection may comprise a protrusion and indentto receive the protrusion. The protrusion may be configured to extendfrom the sleeve portion or the receiving portion. For example, theprotrusion may be a blade or tooth extending outwardly from the sleeveportion or receiving portion. The indent may be formed in thecorresponding portion to receive the protrusion and thereby engage theguide sleeve and the brake carrier, when the sleeve portion is receivedby the receiving portion. The indent may be a pre-formed indent, formedin a portion prior to the sleeve portion being received by the recessingportion and the protrusion being received in the indent. Alternatively,if the protrusion is formed in the sleeve portion and the receivingportion is deformable, the indent may be a formable indent in thereceiving portion, formed when the sleeve portion is received by thereceiving portion and the protrusion is pushed against the deformablereceiving portion.

The protrusion may be configured to extend in an axial direction A orradial direction between the sleeve portion and receiving portion intothe indent.

A second aspect of the invention relates to a disc brake comprising: abrake carrier; a caliper; at least one guide pin comprising a guidesleeve; and a rotational fixing according to the first aspect of theinvention.

To mount the guide pin on the brake carrier, the guide pin may comprisea guide bolt and the disc brake may further comprise a bore formed inthe brake carrier to receive the guide fastener. Preferably, the guidebolt is configured to extend through the sleeve and the bore is arrangedin the receiving portion. The bore may be arranged centrally oreccentrically in the receiving portion. The guide bolt may, for example,be a threaded bolt and the bore disposed in the brake carrier may have acomplimentary threaded bore.

The disc brake may comprise one or more rotational fixings to restrictthe movement of the guide pin. The disc brake may comprise a pluralityof the same type of rotational fixings. Alternatively, the disc brakemay comprise a variety of different types of rotational fixings.

The rotational fixing not only helps to restrict rotation, andoptionally translation, of the guide sleeve relative to the brakecarrier but also advantageously helps to minimize operator error wheninstalling or servicing the disc brake. For example, if the operatorfails to correctly align and inter-engage the sleeve portion and thereceiving portion, but nevertheless tightens the fastener, the guide pinwill not extend in an axial direction A to the brake carrier asrequired. Thus, the operator will not be able to assemble the caliperbecause the guide pin will be out of alignment to the complimentary boreof the caliper.

A third aspect of the invention relates to a method for fixing a guidepin of a disc brake comprising: providing a sleeve portion of a guidesleeve, the sleeve portion having a first cavity; providing a receivingportion of a brake carrier, the receiving portion having a secondcavity; co-locating a connector in the first cavity and the secondcavity to engage the sleeve portion and receiving portion so as restrictrotation of the guide sleeve relative to the brake carrier, andoptionally to restrict translation of the guide sleeve relative to thebrake carrier.

If the second cavity is a pre-formed cavity in the receiving portion,the step of co-locating the connector may comprise: locating a firstpart of the connector in the first cavity; and positioning the sleeveportion with the connector located in the first cavity in the receivingportion; and aligning the first cavity and the second cavity to locatethe second part of the connector in the second cavity.

If the receiving portion is deformable, the step of co-locating maycomprise: locating a first part of the connector in the first cavity;and positioning the sleeve portion with the connector located in thefirst cavity in the receiving portion; and pushing the connector againstthe deformable receiving portion to form the second cavity in which thesecond part of the connector is received.

BRIEF DESCRIPTION OF THE DRAWINGS

For a better understanding of the present invention and to show how itmay be carried into effect, reference will now be made, by way ofexample only, to the accompanying drawings, in which:

FIG. 1 is an isometric view showing a disc brake according to thepresent invention with an element of a rotational fixing for a guidepin;

FIG. 2 is an enlarged isometric cross-sectional view showing the guidepin of the disc brake according to the present invention;

FIGS. 3a and 3b are different views showing the sleeve portion of theembodiment of the rotational fixing;

FIG. 4 is a front view of the brake carrier showing the recess of theembodiment of the rotational fixing;

FIGS. 5 a, 5 b and 5 c are different views showing how ball bearingconnectors may be fitted into cavities on the sleeve portion in theembodiment of the rotational fixing;

FIG. 6 is an exploded perspective view of the disk brake according tothe present invention with the embodiment of the rotational fixing;

FIG. 7 is a cross-sectional view showing the guide pin mounted on thebrake carrier with the embodiment of the rotational fixing.

DETAILED DESCRIPTION

As required, detailed embodiments of the present invention are disclosedherein; however, it is to be understood that the disclosed embodimentsare merely exemplary of the invention that may be embodied in variousand alternative forms. The figures are not necessarily to scale; somefeatures may be exaggerated or minimized to show details of particularcomponents. Therefore, specific structural and functional detailsdisclosed herein are not to be interpreted as limiting, but merely as arepresentative basis for teaching one skilled in the art to variouslyemploy the present invention.

Referring to FIGS. 1 to 7 a disc brake according to the presentinvention is indicated generally at 1. The disc brake comprises a brakecarrier 10. The brake carrier carries an inboard brake pad 12 a and anoutboard brake pad 12 b. A rotor 14 (shown in part) is positionedbetween the brake pads and is rotatable about an axis R. A caliper 16 isslidably mounted with respect to the brake carrier 10 by at least oneguide assembly. In the embodiment depicted, the disc brake comprises twoguide assemblies 18 a, 18 b.

Each guide assembly comprises a guide pin 20 along which the caliper 16can slide and a bore 22 disposed in the caliper for receiving the guidepin. In the embodiment depicted, one of the guide pins 20 a is shorterthan the other guide pin 20 b in order to accommodate vehicleinstallation constraints.

The guide pin 20 comprises a fastener 24 to attach the guide pin to thebrake carrier 10. The fastener is received by a complimentary bore 26disposed in the brake carrier. In the embodiment shown in FIGS. 1 to 7,the fastener 24 for attaching the guide pin to the inboard side of thebrake carrier is a threaded bolt and the bore 26 for receiving thefastener in the brake carrier is a threaded bore. When attached to thebrake carrier, the guide pin extends in an axial direction A. DirectionA is parallel to the axis R of rotation of the rotor and parallel to thetransverse axis of the disc brake.

The guide pin 20 further comprises a guide sleeve 28 at leastsubstantially surrounding the fastener 24 and over which the caliper 16slides. The guide sleeve is a hollow, thin walled tube. The outersurface of the sleeve may be coated with PTFE (polytetrafluoroethylene)or any other suitable material to aid the sliding action of the caliperalong the guide pin. The guide sleeve comprises a main body 30, a firstend 32, a second end 34 and a bore hole 36 extending from the first endto the second end to receive the fastener. Each guide assembly comprisesa sealing boot 38 to shroud the joint between the brake carrier 10 andthe guide sleeve 28.

The bore 22 disposed in the caliper to receive the guide pin is anelongate hole extending from a first side (inboard) to the second side(outboard) of the caliper 16.

During use, the guide pin 20 will be subject to dynamic loads. Tocounter rotational torque, the disc brake of the present inventioncomprises a rotational fixing to rotationally engage the guide sleeve 28and the brake carrier 10 and thereby substantially restrict undesirablerotation of the guide sleeve about its longitudinal axis.

By restricting the rotation of the guide sleeve relative to the brakecarrier, the transmission of rotation from the guide sleeve to thefastener is substantially avoided. Thus, the subsequent risk ofloosening the fastener from the brake carrier is advantageously averted.

To counter translational torque, the rotational fixing is alsoconfigured to translationally engage the guide sleeve 28 and the brakecarrier 10 and thereby substantially restrict translation movement ofthe guide sleeve relative to the brake carrier. By translationallyengaging the guide sleeve and the brake carrier, the rotational fixinghelpfully substantially impedes undesirable lateral translationalmovement of the guide sleeve in the circumferential direction X andperpendicular translational movement of the guide sleeve in thetangential direction Y. Circumferential direction X is perpendicular tothe axial direction A, perpendicular to the tangential direction Y, andparallel to the longitudinal axis of the disc brake. Tangentialdirection Y is tangential to a circle describe by the rotation of therotor 14, perpendicular to the axial direction A, perpendicular to thelongitudinal axis of the disc brake and parallel to the direction inwhich the brake pads 12 a, 12 b are inserted or removed from the brakecarrier 10.

The disc brake may comprise one or more rotational fixings to engage theguide sleeve of each guide pin and brake carrier. In the embodimentdepicted in FIGS. 1 to 7, the disc brake comprises three rotationalfixings to restrict the movement of each guide pin. The rotationalfixings are the same type.

The rotational fixing for the disc brake comprises a sleeve portion ofthe guide sleeve, a receiving portion of the brake carrier for receivingthe sleeve portion and an inter-connection to engage the sleeve portionand receiving portion when the sleeve portion is received in thereceiving portion.

The sleeve portion may comprise an end portion of the guide sleeve, acircumferential flange or rim of the guide sleeve. In the embodimentshown in FIGS. 1 to 7, the sleeve portion of the guide sleeve is acircumferential flange 40 arranged at the first end 32 of the guidesleeve. In this particular embodiment, the flange 40 has a substantiallycircular cross-sectional profile defined by a circular outer edge 42 anda substantially flat flange face 44.

The guide sleeve is mounted on the brake carrier when the sleeve portionis received by the receiving portion. The receiving portion of the brakecarrier may comprise a receiving face against which the sleeve portionis located when the sleeve portion is received by the receiving portion.In the embodiment shown in FIGS. 1 to 7, the receiving portion comprisesa recess 46 formed on the inboard side of the brake carrier into whichthe flange 40 of the guide sleeve can be fitted. The recess 46 has acircular inner edge 48 and a substantially flat, rear recess face 50.The circular inner edge 48 defines the cross-sectional profile of thereceiving portion. The recess face 50 defines the receiving surfaceagainst which the flange face 44 abuts when it is received in therecess. The recess face 50 is deformable. The configuration of therecess 46 compliments the configuration of the flange 40 of the guidesleeve so to help further limit translational movement of the flangewhen the guide pin is subjected to dynamic loads. The bore 26 forreceiving the fastener is located in the recess 46. The bore 26 may becentrally located or eccentrically located in the recess. In theembodiment shown in FIGS. 1 to 7, the opening of the bore 26 iscentrally arranged in the recess face 50. The recess may be manufacturedwith the desired cross-sectional profile using any conventional cutting,milling or machining techniques. The bore may be manufactured by anyconventional drilling techniques.

The inter-connection may comprise any suitable means to inter-lock thesleeve portion and receiving portion, when the sleeve portion isreceived in the receiving portion, so as to inhibit movement of theguide sleeve relative to the brake carrier.

The inter-connection may comprise a connector co-locatable in a firstcavity of the sleeve portion and a second cavity in the receiving potionwhen the sleeve portion is received in the receiving portion. Theconnector may have a cylinder, cuboid, sphere, ovoid, ellipsoid or anyother suitably shaped body.

In the embodiment shown in FIGS. 1 to 7, each inter-connection comprisesa ball bearing connector 52, a first semi-circular cavity 54 formed inthe flange face 44 of the flange to receive a first sector of the ballbearing and a second semi-circular cavity 56 formed in the recess face50 to receive a second sector of the ball bearing. The ball bearingconnector 52, first semi-circular cavity 54 and second semi-circularcavity 56 are configured to form interference fit/press fit connections.The first cavity 54 is pre-formed prior to assembling the rotationalfixing. To enhance the interference fit/press fit connection andminimize tolerance effects, the recess face 50 is deformable and thesecond cavity 56 is formed during assembly of rotational fixing toreceive the second sector of the ball bearing connector. When the ballbearing connector 52 is co-located in the first and second cavities, theflange and recess are inter-connected and any rotation of the guidesleeve or lateral movement between the guide sleeve and brake carrier isthereby restricted.

To mount the guide pin on the brake carrier and engage the guide sleeveand the brake carrier, the ball bearing connectors 52 are initiallyfitted in the first semi-circular cavities 54 of the flange such thatthey protrude from the flange face 44 of the flange. The flange 40 withthe protruding ball bearing connectors 52 is then located in the recess46 such that the flange face 44 with the protruding ball bearingconnectors 52 abuts the recess face 50. The fastener 24 is then extendedthrough the bore hole 26 of the guide sleeve and it is screwed into thebore 26 of the brake carrier. Under the screwing action, the ballbearing connectors 52 are pushed against the recess face 50. The recessface 50 deforms to create second cavities which receive the secondsector of the ball bearing connectors. The ball bearings connectors 52are now co-located in both the first cavities and second cavities andthe co-located ball bearings 52 form a rotational and translationalengagement between the flange and the recess. Scaling boots 38 arefitted to the guide sleeves 28.

When attached to the brake carrier 10, the guide pin 20 extends in anaxial direction A from the brake carrier. Due to the configuration ofthe inter-connection and orientation of the cavities, the co-locatedball bearings extend in the axial direction A between the guide sleeveand the brake carrier.

The caliper 16 will be mounted on the guide pin by locating the guidepin in the caliper bore 22 and sliding the caliper along the guidesleeve.

When fully assembled, the disc brake depicted in FIG. 1 can be actuated.An air actuator (not shown) is provided to move the inboard brake pad 12a into frictional contact with the rotor 14. When the inboard brake pad12 a is pushed towards and contacts the rotor, the caliper slidesinboard along the guide pin. As the caliper slides inboard, it moves theoutboard brake pad 12 b towards the rotor. Hence, the rotor becomesclamped between the inboard and outboard brake pads and the rotation ofthe rotor is frictionally inhibited.

It is apparent that the rotational fixing not only restricts undesirablerotation but also helps to properly align the guide sleeve relative tothe brake carrier during assembly. If the flange and recess are notproperly aligned, the guide sleeve will not extend in the correctdirection from the brake carrier and the ball bearings may not form anengagement. As a result, an operator will not be able to mount thecaliper on the guide pin. Therefore, the rotational fixing usefullyprotects the disk brake from operator assembly error.

In an alternative embodiment, the receiving face of the receivingportion is a surface region of the inboard surface of the brake carrier.The receiving face surface region is substantially flush with theinboard surface. Hence, when the sleeve portion is received by thereceiving portion, the guide sleeve is mounted directly on the in boardsurface of the brake carrier. The second cavities for the ball bearingsare formed directly in the inboard surface of the brake carrier.

Rather than forming the second cavities by pushing the ball bearingsinto the receiving face of the receiving portion, the second cavitiesmay be pre-formed to form an interference or press-fit connection withthe balls bearings, when the sleeve portion is received in the receivingportion and the first cavities and second cavities are aligned. Thereceiving face may be deformable as the ball bearings are co-located inthe pre-formed second cavities to enhance the engaging connection.

To co-locate ball bearings in a different alignment, the first cavitiesand second cavities may be formed in side wall portions of the flangeand recess such that when the ball bearings are co-located in thecavities, the ball bearings extend in a radial direction between thesleeve portion of the guide sleeve and receiving portion of the brakecarrier. The radial direction is perpendicular to the axial direction A.

As an alternative to ball bearing connectors, the inter-connection maycomprises a pin connector, a first cavity disposed in the sleeve portionto receive a first end of the pin connector and a second cavity disposedin the receiving portion to receive a second end of the pin connector.

The inter-connection may additionally or alternatively comprise aprotrusion integrally formed and extending from the sleeve portion orreceiving portion and an indent formed in the corresponding portion toreceive the protrusion. For example, the inter-connection may compriseone or more blades or teeth extending in an axial direction A from thesleeve portion into corresponding indents in the brake carrier.

The rotational fixing may further comprise a friction enhancer toenhance the frictional engagement between the sleeve portion andreceiving portion and thereby further limit the rotation and/ortranslation of the guide sleeve with respect to the brake carrier. Thefriction enhancer may comprise a knurled surface formed on the sleeveportion to enhance the frictional grip of the sleeve portion with thereceiving portion. The knurled surface may be arranged on an outersurface or outer edge of the sleeve portion.

While exemplary embodiments are described above, it is not intended thatthese embodiments describe all possible forms of the invention. Rather,the words used in the specification are words of description rather thanlimitation, and it is understood that various changes may be madewithout departing from the spirit and scope of the invention.Additionally, the features of various implementing embodiments may becombined to form further embodiments of the invention.

What is claimed is:
 1. A rotational fixing for a guide pin of a discbrake comprising: a sleeve portion of a guide sleeve; a receivingportion of a brake carrier that receives the sleeve portion; and aninter-connection to engage the sleeve portion and the receiving portionso as to restrict rotation of the guide sleeve relative to the brakecarrier when the sleeve portion is received by the receiving portion. 2.The rotational fixing of claim 1 wherein the inter-connection engagesthe sleeve portion and receiving portion so as to restrict translationof the guide sleeve relative to the brake carrier when the sleeveportion is received by the receiving portion.
 3. The rotational fixingof claim 1 wherein the sleeve portion further comprises a flangearranged at a first end of the guide sleeve.
 4. The rotational fixing ofclaim 1 wherein the receiving portion further comprises a receivingface.
 5. The rotational fixing of claim 1 wherein the sleeve portionfurther comprises a flange arranged at a first end of the guide sleeveand the receiving portion further comprises a receiving face.
 6. Therotational fixing of claim 4 wherein the receiving face is a surfaceregion of an inboard surface of the brake carrier, and the receivingface is substantially flush with the inboard surface.
 7. The rotationfixing of claim 4 wherein the receiving portion further comprises arecess formed in the brake carrier in which the sleeve portion isreceived so as to restrict translation of the guide sleeve relative tothe brake carrier, and the receiving face is disposed in the recess. 8.The rotational fixing of claim 1 wherein the inter-connection furthercomprises: a first cavity formed in the sleeve portion; a second cavityformed in the receiving portion; and a connector that is co-locatable inthe first cavity and the second cavity when the sleeve portion isreceived by the receiving portion.
 9. The rotational fixing of claim 2wherein: the sleeve portion further comprises a flange that has a flangeface and an outer edge; the receiving portion further comprises a recessthat has a receiving face and an inner edge; and the inter-connectionfurther comprises a first cavity formed on the flange face, a secondcavity formed on the receiving face, and a connector co-locatable in thefirst cavity and the second cavity when the sleeve portion is receivedby the receiving portion.
 10. The rotational fixing of claim 8 wherein:the connector further comprises a ball bearing; the first cavity furthercomprises a semi-circular cavity that receives a first sector of theball bearing; and the second cavity further comprises a semi-circularcavity that receives a second sector of the hall hearing.
 11. Therotational fixing of claim 8 wherein: the connector further comprises apin; the first cavity receives a first end of the pin; and the secondcavity receives a second end of the pin.
 12. The rotational fixing ofclaim 8 wherein the receiving portion is deformable and the secondcavity is formed when the connector is pushed into the receiving portionto form a cavity in which a part of the connector is received.
 13. Therotational fixing of claim 1 wherein the inter-connection furthercomprises: a protrusion extending from the sleeve portion; and an indentformed in the receiving portion that receives the protrusion when thesleeve portion is received by the receiving portion and the protrusionand indent are aligned.
 14. The rotational fixing of claim 1 wherein theinter-connection further comprises: a protrusion extending from thereceiving portion; and an indent formed in the sleeve portion thatreceives the protrusion when the sleeve portion is received by thereceiving portion and the protrusion and indent are aligned.
 15. A discbrake comprising: a brake carrier having a receiving portion; a caliper;at least one guide pin; and a rotational fixing that includes: a guidesleeve that is disposed on the guide pin and has a sleeve portion thatis received by the receiving portion; and an inter-connection thatengages the sleeve portion and the receiving portion so as to restrictrotation of the guide sleeve relative to the brake carrier when thesleeve portion is received by the receiving portion.
 16. The disc brakeof claim 15 wherein: the guide pin further comprises a guide fastenerthat secures the guide pin to the brake carrier; and the disc brakefurther comprises a bore formed in the brake carrier that receives theguide fastener, the bore being arranged in the receiving portion.
 17. Amethod for fixing a guide pin of a disc brake comprising: providing asleeve portion of a guide sleeve, the sleeve portion having a firstcavity; providing a receiving portion of a brake carrier, the receivingportion having a second cavity; and co-locating a connector in the firstcavity and the second cavity to engage the sleeve portion and receivingportion so as to restrict rotation of the guide sleeve relative to thebrake carrier.
 18. The method of claim 17 wherein the connectorrestricts translation of the guide sleeve relative to the brake carrier.19. The method of claim 17 wherein when the second cavity is pre-formedco-locating the connector further comprises: locating a first part ofthe connector in the first cavity; positioning the sleeve portion withthe connector located in the first cavity in the receiving portion; andaligning the first cavity and the second cavity to locate a second partof the connector in the second cavity.
 20. The method of claim 17wherein when the receiving portion is deformable co-locating theconnector further comprises: locating a first part of the connector inthe first cavity; positioning the sleeve portion with the connectorlocated in the first cavity in the receiving portion; and pushing theconnector against the deformable receiving portion to form the secondcavity in which a second part of the connector is located.